package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.result.Result;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 统计指定时间区间内的营业额数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            //日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList =new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
        //TODO
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
           Double  turnover= orderMapper.sumByMap(map);
           turnover= turnover==null?0.0:turnover;
           turnoverList.add(turnover);
        }
        //逗号分割集合里面的日期
        String dateListString = StringUtils.join(dateList, ",");
        //逗号分割营业额
        String turnoverListString = StringUtils.join(turnoverList, ",");
        return TurnoverReportVO.builder().dateList(dateListString).turnoverList(turnoverListString).build();
    }
    /**
     * 统计指定时间区间内的用户数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate>dateList= new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN) ;
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //总用户数量查询
            Map totalUserMap = new HashMap();
            totalUserMap.put("end", endTime);
            Integer totalUser = userMapper.countByMap(totalUserMap);
            //新增用户数量查询
            Map newUserMap = new HashMap();
            newUserMap.put("begin", beginTime);
            newUserMap.put("end", endTime);
            Integer newUser = userMapper.countByMap(newUserMap);

            totalUserList.add(totalUser);
            newUserList.add(newUser);

        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }
    /**
     * 统计指定时间区间内的订单数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getorderstatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //计算时间区间内的订单总数量
        Integer totalorderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数量
        Integer validorderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate =0.0;
        if(totalorderCount != 0) {
            //计算订单完成率
            orderCompletionRate = (validorderCount * 1.0) / totalorderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,  ","))
                .orderCountList(StringUtils.join(orderCountList,  ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalorderCount)
                .validOrderCount(validorderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }
    /**
     * 根据条件统计数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        return orderMapper.countByMap(map);
    }

    /**
     * 统计指定时间区间内的最佳菜品
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getorderStatistics(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop(beginTime, endTime);
        //TODO
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String namelist = StringUtils.join(names, ",");
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");
        return SalesTop10ReportVO
                .builder()
                .nameList(namelist)
                .numberList(numberList)
                .build();
    }
    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {

        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
          //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
        //通过POI写入数据
        InputStream in=this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet(  "Sheet1");
            //填充数据--时间
            sheet.getRow(1).getCell( 1).setCellValue("时间:" + dateBegin + "至" + dateEnd);
            //获得第4行
            XSSFRow row = sheet.getRow(  3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(  4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(  6).setCellValue(businessDataVO.getNewUsers());
            //获得第5行
            row = sheet.getRow(  4);
            row.getCell(  2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(  4) .setCellValue(businessDataVO.getUnitPrice());
            //填充详细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
                row = sheet.getRow(  7 + i);
                row.getCell(  1).setCellValue(date.toString());
                row.getCell( 2).setCellValue(businessData.getTurnover());
                row.getCell(  3).setCellValue(businessData.getValidOrderCount());
                row.getCell(  4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(  5).setCellValue(businessData.getUnitPrice());
                row.getCell(  6).setCellValue(businessData.getNewUsers());

            }

            //写入excel表
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

}


